<?php
namespace TYPO3\CMS\Core\Localization\Parser;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

/**
 * Parser for XLIFF file.
 *
 * @author Dominique Feyer <dfeyer@reelpeek.net>
 */
class XliffParser extends AbstractXmlParser {

	/**
	 * Returns array representation of XML data, starting from a root node.
	 *
	 * @param \SimpleXMLElement $root A root node
	 * @return array An array representing the parsed XML file
	 */
	protected function doParsingFromRoot(\SimpleXMLElement $root) {
		$parsedData = array();
		$bodyOfFileTag = $root->file->body;
		if ($bodyOfFileTag instanceof \SimpleXMLElement) {
			foreach ($bodyOfFileTag->children() as $translationElement) {
				/** @var \SimpleXMLElement $translationElement */
				if ($translationElement->getName() === 'trans-unit' && !isset($translationElement['restype'])) {
					// If restype would be set, it could be metadata from Gettext to XLIFF conversion (and we don't need this data)
					if ($this->languageKey === 'default') {
						// Default language coming from an XLIFF template (no target element)
						$parsedData[(string)$translationElement['id']][0] = array(
							'source' => (string)$translationElement->source,
							'target' => (string)$translationElement->source
						);
					} else {
						// @todo Support "approved" attribute
						$parsedData[(string)$translationElement['id']][0] = array(
							'source' => (string)$translationElement->source,
							'target' => (string)$translationElement->target
						);
					}
				} elseif ($translationElement->getName() === 'group' && isset($translationElement['restype']) && (string)$translationElement['restype'] === 'x-gettext-plurals') {
					// This is a translation with plural forms
					$parsedTranslationElement = array();
					foreach ($translationElement->children() as $translationPluralForm) {
						/** @var \SimpleXMLElement $translationPluralForm */
						if ($translationPluralForm->getName() === 'trans-unit') {
							// When using plural forms, ID looks like this: 1[0], 1[1] etc
							$formIndex = substr((string)$translationPluralForm['id'], strpos((string)$translationPluralForm['id'], '[') + 1, -1);
							if ($this->languageKey === 'default') {
								// Default language come from XLIFF template (no target element)
								$parsedTranslationElement[(int)$formIndex] = array(
									'source' => (string)$translationPluralForm->source,
									'target' => (string)$translationPluralForm->source
								);
							} else {
								// @todo Support "approved" attribute
								$parsedTranslationElement[(int)$formIndex] = array(
									'source' => (string)$translationPluralForm->source,
									'target' => (string)$translationPluralForm->target
								);
							}
						}
					}
					if (!empty($parsedTranslationElement)) {
						if (isset($translationElement['id'])) {
							$id = (string)$translationElement['id'];
						} else {
							$id = (string)$translationElement->{'trans-unit'}[0]['id'];
							$id = substr($id, 0, strpos($id, '['));
						}
						$parsedData[$id] = $parsedTranslationElement;
					}
				}
			}
		}
		return $parsedData;
	}

}
